Hello Guys: I builded a new scrubber the last week and putted it to work, the water is passing through the net perfectly and the device seems to be doing great, it is working like this: -16x20 cm, only one side, made inside an acrilyc box. -7 leds: 2 Cree 660nm Photo Red, 1 Semiled 420nm Deep Blue, 2 Reds 630nm, 2 Full Spectrum leds. The last four will be replaced by Cree 660nm and Semiled 420nm also, but right now I don't have the Crees and started with the red and full spectrum. My Aq is 180L net water, very low bioload (2 fishes and some small corals), have a very big skimmer (rated for 700L), Act. Carbon and PhosphateMinus to reduce PO4. My NO3 went from 5ppm to an absolute 0 as soon as I turned on the skimmer, I am not testing PO4 right now, but a Hanna PO4 test is on it's way to my home. However, I have some very green nasty hair algae on the upper center of my display, on the reef rocks, and I want them out of there! The tank is aimed to be for SPS, with low nutrients, and the small frags I purchased a month ago turned super colored as soon as I introduced them to the tank. Scrubber started working one week ago, how much time time do you think will it take until I can see algae on it, and the reduction of my hair algae on the display? Thank you guys. Steve.